Portable battery



FIG. 1 is a front perspective view of a portable battery according to the present invention;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a cross-sectional view thereof taken along line 9-9 in FIG. 7; and,

FIG. 10 is a front perspective view thereof, shown in an environment of use.

The broken lines in FIGS. 1-9 are for the purpose of illustrating portions of the portable battery that form no part of the claimed design. The broken lines in FIG. 10 are for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM I claim the ornamental design for a portable battery, as shown and described. 